Navigation Accuracy Category for position and Navigation Integrity Category Exemption (12555)
The FAA has granted Exemption 12555 with a strict, limited timeframe in which operators must equip with new navigation receivers. Exemption 12555:
- does not exempt the requirement for compliant ADS-B Out equipment to be installed and operational on aircraft flying in ADS-B rule airspace.
- does allow for the extended use of an older type of GPS navigation receiver already installed in some aircraft. All other ADS-B Out equipment requirements must still be met and operational.
- was granted because multi-frequency/multi-constellation GPS navigation receivers suitable for transport category aircraft that meet the ADS-B Out Rule requirements were not available for purchase or installation in sufficient quantities until closer to 2020.
- imposes certain conditions, limitations and additional pre-flight responsibilities on the operators.
The deadline to seek the relief provided under Exemption 12555 was August 1, 2018.
An applicant who has failed to submit the required documents by August 1, 2018 has failed to comply with an express condition of the exemption and is not eligible to exercise the relief granted under the provisions of the exemption. Interested parties may refer to United States Code of Federal Regulations (CFR), Part 11, General Rulemaking Procedures, which describes a formal means to petition for exemption. Another option is to operate in accordance with the preflight prediction guidance described in Advisory Circular (AC) 90-114A CHG 1, or latest revision.